#pragma GCC target("avx2")
#pragma GCC optimize("03")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std; typedef long double ld; typedef long long ll;
typedef unsigned long long ull;
#define endl "\n"
#define FOR(i,a,b) for(int i=(a);i<=(b);i++)
#define rep(i,n) for(int i=0;i<(n);i++)
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define ALL(x) (x).begin(), (x).end()
constexpr int INF=1<<30; constexpr ll LINF=1LL<<60; constexpr ll mod=1e9+7; constexpr int NIL = -1;
template<class T>inline bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>inline bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
template<class T>inline int popcount(T a) {return __builtin_popcount(a);}
//-------------------
constexpr int MX = 1e5+4;
vector<int> G[MX];
vector<bool> visited(MX, false);

int dfs(int node) {
    visited[node] = true;
    if(G[node].size() == 0) return 0;
    int cnt = G[node].size() - 1;
    for(auto &e: G[node]) {
        if(!visited[e]) cnt += dfs(e);
    }
    return cnt;
}
int main() {
    cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(15);
    int n; cin >> n;
    rep(i,n-1) {
        int a,b; cin >> a >> b;
        a--;  b--;
        G[a].push_back(b);
        G[b].push_back(a);
    }

    cout << dfs(0) - 1 << endl;
    return 0;
}